DK0880225T3 - Forstærker med reduceret indgangskapacitet - Google Patents

Forstærker med reduceret indgangskapacitet

Info

Publication number
DK0880225T3
DK0880225T3 DK98108001T DK98108001T DK0880225T3 DK 0880225 T3 DK0880225 T3 DK 0880225T3 DK 98108001 T DK98108001 T DK 98108001T DK 98108001 T DK98108001 T DK 98108001T DK 0880225 T3 DK0880225 T3 DK 0880225T3
Authority
DK
Denmark
Prior art keywords
amplifier
input capacity
reduced input
reduced
capacity
Prior art date
Application number
DK98108001T
Other languages
English (en)
Inventor
Peter L Madaffari
Original Assignee
Tibbetts Industries
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tibbetts Industries filed Critical Tibbetts Industries
Application granted granted Critical
Publication of DK0880225T3 publication Critical patent/DK0880225T3/da

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/14—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/56—Modifications of input or output impedances, not otherwise provided for
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/50—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower
    • H03F3/505—Amplifiers in which input is applied to, or output is derived from, an impedance common to input and output circuits of the amplifying element, e.g. cathode follower with field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/513—Indexing scheme relating to amplifiers the amplifier being made for low supply voltages

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
DK98108001T 1997-05-23 1998-04-30 Forstærker med reduceret indgangskapacitet DK0880225T3 (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/862,500 US6023194A (en) 1997-05-23 1997-05-23 Amplifier with reduced input capacitance

Publications (1)

Publication Number Publication Date
DK0880225T3 true DK0880225T3 (da) 2005-12-19

Family

ID=25338647

Family Applications (1)

Application Number Title Priority Date Filing Date
DK98108001T DK0880225T3 (da) 1997-05-23 1998-04-30 Forstærker med reduceret indgangskapacitet

Country Status (5)

Country Link
US (1) US6023194A (da)
EP (1) EP0880225B1 (da)
CA (1) CA2236241C (da)
DE (1) DE69832004T2 (da)
DK (1) DK0880225T3 (da)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6353344B1 (en) 2000-05-22 2002-03-05 Microtronic Us, Inc. High impedance bias circuit
US6812788B2 (en) 2001-03-26 2004-11-02 Georg Neumann Gmbh Amplifying circuit
US7221766B2 (en) * 2002-04-15 2007-05-22 Knowles Electronics, Llc Microphone input buffer biasing circuit
US7092538B2 (en) 2002-04-15 2006-08-15 Knowles Electronics, Llc Switched microphone buffer
US7149317B2 (en) 2002-04-18 2006-12-12 Sonionmicrotronic Nederland B.V. CMOS high impedance circuit
US7688987B2 (en) * 2002-04-24 2010-03-30 Knowles Electronics, Llc Electret microphone buffer circuit with significantly enhanced power supply rejection
US7030680B2 (en) * 2003-02-26 2006-04-18 Integrated Discrete Devices, Llc On chip power supply
CN100476675C (zh) * 2003-02-26 2009-04-08 集成离散设备有限责任公司 芯片上电源
US7592870B2 (en) * 2007-08-13 2009-09-22 Newport Media, Inc. Low noise, low power, high linearity differential amplifier with a capacitive input impedance
US20100215198A1 (en) * 2009-02-23 2010-08-26 Ngia Lester S H Headset assembly with ambient sound control
US9300259B2 (en) 2012-04-04 2016-03-29 Ams Ag Sensor amplifier arrangement and method for amplification of a sensor signal
US10211792B2 (en) 2012-04-04 2019-02-19 Ams Ag Sensor amplifier arrangement and method of amplifying a sensor signal
DE112012006395T5 (de) * 2012-05-21 2015-03-05 Epcos Ag Verstärkerschaltung
JP6239266B2 (ja) * 2013-05-17 2017-11-29 株式会社東芝 Ｄｃ−ｄｃコンバータ制御回路およびｄｃ−ｄｃコンバータ

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512100A (en) * 1968-07-03 1970-05-12 Intern Research Products Inc Audio frequency amplification circuit
CA1024239A (en) * 1972-04-17 1978-01-10 Rca Limited Low noise detector amplifier
US4063050A (en) * 1976-12-30 1977-12-13 Industrial Research Products, Inc. Acoustic transducer with improved electret assembly
US4509193A (en) * 1983-07-11 1985-04-02 Industrial Research Products, Inc. Miniature acoustical transducer with filter/regulator power supply circuit
FR2640444B1 (da) * 1988-12-09 1991-03-15 Labo Electronique Physique
US5083095A (en) * 1990-08-22 1992-01-21 Knowles Electronics, Inc. Plural source follower amplifier
US5097224A (en) * 1991-04-11 1992-03-17 Telex Communications, Inc. Self-biasing, low noise amplifier of extended dynamic range
US5337011A (en) * 1992-12-14 1994-08-09 Knowles Electronics, Inc. Pre-amplifier
US5589799A (en) * 1994-09-29 1996-12-31 Tibbetts Industries, Inc. Low noise amplifier for microphone

Also Published As

Publication number Publication date
EP0880225A3 (en) 2001-01-24
US6023194A (en) 2000-02-08
CA2236241C (en) 2002-07-16
EP0880225A2 (en) 1998-11-25
CA2236241A1 (en) 1998-11-23
DE69832004T2 (de) 2006-07-13
DE69832004D1 (de) 2005-12-01
EP0880225B1 (en) 2005-10-26

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